I recently purchased a Whirlpool WOS51ES4ES electric oven from Home Depot with the intention of installing it myself. Our old oven is gas, so I need to run a new 240 circuit. The oven draws 20A.
I am currently at a loss regarding how to attach the pigtail connection that came with the oven to the 240 V wiring that I am going to run to the breaker box. I initially presumed that I need a junction box, and I'm not sure if the twist-on style are appropriate for these current levels. Additionally, I understand that there is an NEC requirement to be able to disconnect the oven from power locally (i.e. via unplugging it, or turning off a switch).
Is wiring up a 240 V junction box for this situation any different than a 120 V circuit?
Home Depot has been no help. Initially they told me to purchase four of these, connect like colors inside a junction box, and then just "wrap them up like hell with electrical tape". This sounded rather dangerous to me, so I came back during another shift to ask someone else. This time they said that my oven should have arrived with a plug (not a pigtail), and that I have to install a 240 V outlet to plug the oven into. I then also have to replace the pigtail with a corded plug by opening the oven, removing the pigtail from its attachment points (which they presumed were screw ring terminals) and install the corded plug by replacing like colors. Unfortunately, when I opened the oven, I found that the pigtail feeds into a wiring harness that runs to multiple places in the oven and there are no screw terminals in sight.
So I'm at a loss of what to do next. Surely there must be a way to install the oven without re-engineering it.